We don't have the brutal cold you do, but we had several below freezing nights and my polish just huddled up with the rest of the crew and did fine. I did block the windows to keep the cold air out but they never once acted like they were suffering or uncomfortable.

I trim the area around their eyes. I have someone hold them steady while I do it so they can see better, I only have to do it once a year or until they replace those trimmed feathers.

I love my Polish, they are comical and once you spend time with them they become pretty social. I taught them to love me with meal worms and corn on the cob.

the parents have their own pen with access to the outside all yr round, we block the windows.. the only thing i do notice is if their heads get wet it freezes and looks like bad hair days for a bit. i used a new waterer that she couldnt get her whole head in and she did better, but if she goes out in rain and its freezing same thing.

Problem is free ranging something gets them from either above or on the ground. My last hen I kept her crest trimmed so she could see what was going on. Flood got her rather than a predator this time. Frequent haircuts kind of defeats the point of having polish.